Edwin h



tait-e @gist ai cala a EDWIN H. GRANT, OFWASHING'[ON, DISTRICT OF COLUMBIA.l

' Laim Patent No. 87,041, dem; peana/1y 16, 1869.

IMPROVE!) PROCESS OF CO'OLINGyTHE ATMOSPHERE IN ROOMS .AND OTHER ENCLOS` l URES.

The Schedule referred to :ln these Letters Patent and making part of the same.:

To all wlwm t ma/y comm Be it known that I, EDWLN H. GRANT, of Washington, in the District of Columbia, have invented .i new and useful Process for Cooling the Atmosphere in Rooms, or other Enclosures, which consists in the use of a current of steam of -low temperature, or of such steam commingled with air, as will be hereinafter described; and I do ,hereby-.v declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, and t'o'the letters of reference marked thereon,and being a part of this specification, said drawing showing one method of applying my process;

Figure l is a plan view of my apparatus without the steam-jacket. ,f

Figure 2 is a side elevation ofthe same'portions of my apparatus which are shown in fig. 1.

Figure 3 isa vertical section of my apparatus, in-

cluding the steam-jacket, or casing G, and its induc-Y tion-pipe H, and its eduction-pipe I. vThis view repgesents a section cut through the lines x x, shown in g. I. Thersame letters indicate like parts in each ligure.

The-'object of my invention is the cooling of air in the rooms of a building, by means of an apparatus placed within or adjacent to such building, or it may be -done in any suitable place, and compressed into suitable vessels and transported in such vessels to any place where it may be desirable to use such cooled air.

forms, and apply thereto a check-valve, B, a saftyff valve, C, a pressure-gauge, with its index or register D, a stop-cock, E, an air-pump, F, and a Asteam-jacket or casing, G.

This steam-jacket need only be attached whilst the air chamber A is beingilled.

:The ain-chamber A is filled with compressed air by' means of an'air-pump, F.

The air thuseompres'sed is retained in the air-chamber A by means of the check-valve B.

` The quantity of air compressed is indicated onA the register of-the pressure-gauge D, in the usual manner, and is limited by the safety-valve C.

The compressed air is liberated at will by the stopcock E.

The heat evolved during the process of compressing the air into the air-chamber A is abstracted by meansl of a jet of exhaust-steam, or steam of a low temperature, direct from the generator, which may he mingled with a current of air in its passage from the generator, by any of the well-known means, and which is made to pass into the steam-jacket or, casing G, and around the air-chamber A, through the induction-pipe H, and allowed to escape through lthe eduction-pipe '1. f These induction and eduction-pipes should be suciently large to allow the buirent of steam, or of steam and air commingled, to' pass through them, and'throu'gh the steam-jacket, at a rate of speed equal to that'at which it leaves the generator, so that any sudden development of heat which may be caused by a rapid condensation of air, may-be carried oft' with rapidity, and thus prevented from injuring the joints or other portions of the vessel which contains such compressed a/lr.

It is apparent that steamfin passing through or around a vesselin which air is being compressed, at a 'rapid rate, will take up and carry away the heat which is developed by such compression, and that air thus situated will soon be reduced to the temperature of the passing current of steam; and it is also apparent that such steam may be. used for any purposev to which steam of its-temperature is applicable after having been so used. l

I am aware that devices for cooling air have been used, in which va current of air, vand in some cases a current of water, has been made to flow around and in contact with the vessel which contained the air, but these have failed to answer the desired purpose, for the reason that their aflinity for heat,.and the comparatively slow motion which is imparted to them, have not enabled them to carry olf the heat generated by rapid condensation of the air, with the rapidity required. I, therefore, do not claim the cooling o f air by the use of either air or water, used singly, but,

What I do claim, and desire to secure by Letters Patent, is-

l. The process of cooling air by the use of a jet or current of steam, or of steam and air commingled, substantially as described.

2.l The combination of the air-chamberA, lthe checkvalve B, the safety-Valve C, the pressure-gauge, with itsindex or register D, the stop-cock E, the air-pump F, substantially as shownand described.

Witnesses:

HARRY C. RAY, Jas. K. MOORE.

EDWIN H. GRANT. l. 

